EP 2053842 B1 20130703 - Noise correction circuit, imaging apparatus, and noise correction method
Title (en)
Noise correction circuit, imaging apparatus, and noise correction method
Title (de)
Rauschberichtigungsschaltung, Bilderzeugungsvorrichtung und Rauschberichtigungsverfahren
Title (fr)
Circuit de correction du bruit, appareil d'imagerie et procédé de correction du bruit
Publication
Application
Priority
JP 2007274496 A 20071022
Abstract (en)
[origin: EP2053842A2] A noise correction circuit that detects and corrects noise included in an image signal output from an image sensor is provided. The noise correction circuit includes a noise determining unit, a noise removing unit, and a random number adding unit. The noise determining unit is configured to calculate an average value of a signal level in a predetermined range of the image signal output from the image sensor and use the calculated average value to calculate a noise component in a predetermined direction. The noise removing unit is configured to remove noise from the image signal output from the image sensor in response to the noise component determined by the noise determining unit. The random number adding unit is configured to add a random number at a level not determined by quantization of the image signal to the image signal after removal of the noise by the noise removing unit.
IPC 8 full level
H04N 5/365 (2011.01); H04N 5/335 (2011.01); H04N 5/374 (2011.01); H04N 5/378 (2011.01); H04N 9/04 (2006.01); H04N 9/09 (2006.01)
CPC (source: EP US)
H04N 23/13 (2023.01 - EP US); H04N 23/84 (2023.01 - EP US); H04N 25/677 (2023.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 2053842 A2 20090429; EP 2053842 A3 20091125; EP 2053842 B1 20130703; CN 101420518 A 20090429; CN 101420518 B 20130327; JP 2009105581 A 20090514; JP 4396757 B2 20100113; US 2009103829 A1 20090423; US 8233737 B2 20120731
DOCDB simple family (application)
EP 08253255 A 20081007; CN 200810171169 A 20081022; JP 2007274496 A 20071022; US 28792608 A 20081015